Oracle 9i数据库的新特征(英汉对照)作者：F_Q_Y

Oracle9i Database New Features
Oracle 9i数据库的新特征
作者：F_Q_Y
Important new features are introduced with the release of the Oracle9i Database, including advancements in Real Application Clusters, systems management, availability, scalability, and security.
Oracle 9i的发行引入了许多重要的新特征，包括实时应用集群技术，系统管理，可用性，可扩展性以及安全性方面的进步。
可用性
Availability
Oracle9i dramatically extends Oracle's leadership in Internet database availability, which is critical for any e-business application. Key areas in Oracle9i include:
Oracle9i 显著的增强了Oracle在互联网数据库可用性方面的领导地位，可用性对于任何电子商务应用来说，都是至关重要的。关键领域包括：
Enhanced Disaster Recovery Environment
增强的灾难恢复环境
Many tasks for managing a standby database are now automated. LogMiner now supports log queries based on changes and has comprehensive log analysis for additional datatypes, plus an easy-to-use graphical user interface.
管理备份数据库的许多任务现在可以自动实现。日志挖掘工具（LogMiner）支持基于变化的日志查询，更加广泛的附加数据类型的分析，并且具有易于使用的图形用户界面。
Online Data Evolution
在线数据演化
Oracle9i contains a new online reorganization and redefinition architecture that allows much more powerful reorganization capabilities, including an online CREATE TABLE AS SELECT operation.
Oracle9i包含一个新的在线数据重组和重定义架构，允许功能更加强大的重组能力，包括在线的CREATE TABLE AS SELECT操作！
Precision Database Repair
精确的数据库修复
Oracle9i includes better prevention and improved handling of disk corruption, and is able to restore the database to a consistent state after recovery.
Oracle9i很好的预防磁盘崩溃、改进磁盘崩溃的处理，因此在修复后能够将数据库恢复到一致状态。
Scalability
可扩展性
Oracle9i allows e-business to scale the most demanding e-business applications with intensive transactions loads. Key areas include:
Oracle9i允许电子商务使用的密集的事务载荷来满足最为苛刻的电子商务应用。关键领域包括：
Increased Transaction Throughput on Oracle9i Real Application Clusters
增强的Oracle9i 实时应用集群的事务吞吐量
Scalability opportunities are increased with little or no performance cost through Oracle9i Real Application Clusters. Customers can horizontally scale the database tier as needed.
借助于Oracle9i 实时应用集群，用户以很小的性能代价或是不需要性能作为代价，就可以增加可扩展的可能。客户可以水平的扩展数据库至需要的级别。
Scalable Session State Management
扩展的会话状态管理
The footprint required for each user on Oracle9i is substantially reduced, allowing more users to be hosted on the same, or larger, hardware platforms.
充分的减少了每个用户在Oracle9i 上的资源占用，同样的或更大的硬件平台支持更多的用户托管。
Fine-Grained, Automatic Resource Management
细粒度，自动化的资源管理

Administrators gain more granular control over resources through new features, and can specify the maximum active sessions per consumer group.
通过几个新特征的引入，管理者可以对资源实施更小粒度的控制，能够指定每个用户群最大数目的活动会话。
Performance
性能
Oracle9i is the continued performance leader in all relevant areas. Measurement and tuning projects continue to improve Oracle9i runtime performance. A major focus performance improvements in Oracle9i are in areas critical for e-business.
在所有相关领域，Oracle9i 延续了性能领头羊这一地位。测量和调整方案持续不断的提高Oracle9i 的运行性能。Oracle9i主要的性能提高集中在电子商务关键领域。
Native Compilation and Improved PL/SQL Optimization
本地编译和改进的PL/SQL优化
Support for native compilation and optimization of PL/SQL improves performance of many business applications.
对于本地编译和PL/SQL优化提高了多数商务应用的性能
Latch Contention Improvements
改进的插销竞争
Oracle9i includes general I/O improvements, as well as latch contention issues affecting highly active systems.
Oracle9i包括通用的I/O性能改进，以及对影响高活动系统（e.g. data warehouse and OLTP）的闭锁竞争的改进。
注： Latch Contention 加锁（插销）竞争. 插销加锁是SGA中保护共享数据结构的低层的串行化机制。插销latch是一类可以非常快的获得和释放的锁。
Enhanced Java Performance
加强的Java性能
Various improvements contribute to enhanced Java performance.
多种改进提高了Java的性能
Network and Distributed Database Performance
网络和分布式数据库性能
Network and distributed database performance has been improved by database-to-database communication with OCI.
应用OCI的数据库间通讯改进了网络和分布式数据库性能
Security
安全性
Oracle9i continues to provide the most secure application development and deployment platform in the industry. Key areas include:
Oracle9i继续为工业界提供最为安全的应用开发和部署平台，关键领域包括：
Strong Three-Tier Security
坚固的三层安全体系
Three-tier security is enhanced by proxy authentication, including credential proxy of X.509 certificates or distinguished names (DN), support for thick JDBC, connection pooling for application users (thick and thin JDBC and OCI), and integration with LDAP.
借助于代理授权，增强了三层（data, users & companies）安全性。支持的功能包括：X.509认证或者特殊名字(DN)的信任代理，瘦JDBC的支持，应用（胖或瘦的JDBC、OCI）的连接缓冲，同LDAP的集成。
Security for Hosting Environments
托管环境的安全性
Hosting security is provided through enhancements in Virtual Private Database (VPD), fine-grained auditing, and Web-based single sign-on.
通过增强的虚拟专用数据库，细粒度审计，基于web的单点登录(SSO)提供托管安全性
Standards-Based Public Key Infrastructure (PKI)
支持基于标准的公共密钥体系(PKI)结构
PKI includes support for PKCS#12 certificates, which enable existing PKI credentials to be shared by an Oracle Wallet, thus reducing PKI deployment costs and increasing interoperability.
PKI包括对PKCS#12认证的支持，使得现有的PKI信任可被Oracle Wallet共享，从而减小PKI部署的代价、增加了系统的互用性
Improved User and Security Policy Management
改进的用户和安全管理策略
A large number of enhancements have been made in areas ranging from management of network naming and password-based user management to new replication queue management and reconciliation tools.
许多增强被用于从网络命名和基于口令的用户管理到新的复制队列管理和调和工具领域。
Data Encryption and Label Security
数据加密和标签安全
Oracle Label Security provides an out-of-the-box fine-grained access control solution. Encryption enhancements support most popular algorithms for encryption and data integrity.
Oracle的标签安全提供了一个透明的细粒度访问控制解决方案。加密的增强支持许多流行的加密和数据集成算法。
Development Platform for Developing E-Business Applications
电子商务应用开发平台
Oracle9i continues to offer the best development platform for e-business and traditional application development. Key areas include:
Oracle9i继续提供电子商务和传统应用的开发平台，关键领域包括：
Enterprise Java Engine
企业Java引擎
The Oracle9i JVM (previously JServer) embedded in both Oracle9i and Oracle iAS allows reliable, flexible, scalable, and secure e-business applications deployment.
Oracle9i  JVM (以前的JServer)嵌入在Oracle9i and Oracle iAS ,支持可靠的、柔性化的、可扩展的和安全的电子商务应用的部署。
Oracle XML Developer's Kit
Oracle XML开发工具箱
Several enhanced database operations store XML in Oracle9i through SQL and render traditional database data as XML. Included is a native XML datatype These functionalities are required to support e-business, packaged applications, and Internet content management. 通过SQL和映射传统的数据库数据成为XML，几个增强的数据库操作存储XML到Oracle9i 中。也包括一个本地XML数据类型。这些功能是支持电子商务、打包应用和互联网组件管理所必需的。
SQL and PL/SQL Improvements
SQL and PL/SQL 改进
Among the many SQL and PL/SQL improvements are multilanguage server-side debugging and support for inheritance and multilevel collections, which make it possible to build complex models inside the database.
SQL and PL/SQL的改进包括多语言服务端调试、支持继承和多级聚集，这也使得在数据库中构造复杂的模型成为可能。
Manageability  管理性
Management is one of the key areas of improvement for Oracle9i, and now, all essential management functions can be managed from a Web browser. You can use the Oracle9i management approach to do the following tasks:
管理是Oracle9i 改进的关键领域之一。如今，所有主要的管理功能都可以通过Web浏览器进行。你可以使用Oracle9i 管理工具实现下面的任务：


20[/SIZE] 255[/COLOR]